we begin with the biting cold snap that just won't quit, blasting a big chunk of the country with a brutal dose of arctic air. >> as snow moves from to oklahoma from ohio, temperatures are plummeting even more this morning. look at some of these numbers. at this moment, minus 3 in bismarck, north dakota. minus 1 in denver. and a staggering 17 below zero in glasgow, montana. our coverage begins now, with tahman bradley. >> reporter: this morning, half the country is waking up in a deep freeze. overnight, temperatures plummeted, as winter storms blasted two dozen states. slick and icy roads are making diving conditions dangerous. from montana, to north dakota, to minnesota. >> we're going to hit. we're going to hit. >> reporter: in northern minnesota, a powerful storm dumped over two feet of snow. the conditions didn't stop these brave postal workers from trying to deliver holiday packages on time. >> it's the most enjoyable time of year when we have bad weather conditions. but we all try to stay in the christmas spirit.